Inkomba ye-refractive yelensi, 1.49, 1.56, 1.60, 1.67, 1.71, 1.74 kuphawu olungenhla lwelensi ibhekisela kunkomba yokugqama yelensi. Ezingilazini ze-myopic, ukuphakama kwenkomba ye-refractive ye-lens, kuya kuba mncane umkhawulo welensi, ngesisekelo sokuthi amanye amapharamitha ayafana.